Guys, Can anyone help me with the correct valve clearances for a F105A type engine for the UK market please? I have the USA specs which state: With COLD Engine Intake: 0.20 + 0.25mm Exhaust: 0.30 + 0.35mm I am not sure if this is the correct clearances for the Type F105A. Anyone with the correct data? Thanks
Any help gentlemen? Would really appreciate it, as I am attempting to get the work done today. Thanks
The 308QV-328 Workshop Manual 550/89 lists the values that you show as for the F105A engine. However, the US 308QV OMs (260/83 and 307/84) and the standard version 308QV OM 248/82 show the intake as the same, but on the exhaust side they go up to 0.35-0.4 mm clearance cold. What is your reference for the exhaust side of a US 308QV being 0.3-0.35 mm clearance cold? Can you hit 0.35 mm exactly?
Hi Steve, How are you doing? Due to our International Time Zones, I am just getting the mechanic to do now. Will let you know if we can hit 0.35mm exactly. The local Ferrari workshop uses the following specs. for the F105A Intake : 0.20mm + 0.25mm Exhaust: 0.35mm + 0.40mm Shims are apparently from the old Volvo 240 series engines. Will get back to you on what is on my engine at the moment before they are adjusted. Apparently the cams have been timed on the engine. I wonder why and will get a better idea when I measure the settings myself. Thanks
Steve, Got the clearances checked and adjusted. Apparently, they were on 'spec'. INTAKE : 0.20mm EXHAUST: 0.35mm This is on a F105A (UK) spec engine.
Sounds good -- I think you're safe either way (and this adds to the confusion because there's no strong reason for F to correct or clarify themselves on these minor spec discrepancies). I had an anecdotal recollection in my head that when the continous air injection systems were added, they upped the exhaust side clearance a little bit for the higher exhaust temps, but I can really find no evidence to support that (so I'm trying to get it out of my head ).
